SirPyersMostyn, 6th Bt. was born on 23 December 1749.1 He was the son of SirEdwardMostyn, 5th Bt. and BarbaraBrowne.2 He married BarbaraSlaughter on 20 October 1780.1 He died on 29 October 1823 at age 73.1 He succeeded as the 6th Baronet Mostyn, of Talacre, co. Flint [E., 1670] in March 1775.1